01 / 10 · Fork and mating pin

Investment-Cast Fork Ends with Paired Machined Pin Bores

Relia reviews investment-cast fork ends with CNC-finished pin bores as one assembly interface. Specify the pin fit, the relationship between both bores and the clear gap for the mating part; two acceptable hole diameters alone do not define an acceptable fork.

Relia reviews the casting blank and CNC route together so sample acceptance addresses the complete fork, rather than two unrelated hole readings.

Review your fork and pin interface

Cylindrical fork end with two raised ears and paired pin openings — The ears and open slot connect the casting geometry to the mating pin.

02 / 10 · Factory and assembly alignment

The Fork Opening and Pin Fit as One Assembly

Relia starts with the pin, mating component and controlled fork drawing. We separate the cast slot, the finished bores and the surrounding contacts in the proposed manufacturing scope.

Slot

Space for the mating component and its required movement.

Paired bores

Pin fit and the specified relationship between both ears.

Supporting body

The reference that locates the fork in the larger assembly.

Mounting foot with two raised parallel ears and a bore in each ear — A mounting foot introduces a further reference for the paired ears.

03 / 10 · Functional input

The Mating Pin and Clear Opening

Specify the pin fit and the clear slot width in the delivered condition. Include the mating component's envelope and any relevant rotation or assembly clearance.

Identify the drawing references used to locate the fork. These requirements guide the bore relationship and the local stock needed in each ear.

Review precision-cast lever and linkage component enquiries

04 / 10 · Blank geometry

Cast Slot Geometry and Sidewall Stock

Define which slot surfaces remain cast and which are machined. Review the ear sections, slot access and the material required around the finished pin bores.

Cast envelope

Show the outer ears, internal slot and local transitions in section.

Finished interface

Overlay the bore and any machined slot surfaces on that envelope.

Keep the slot requirement separate from the bore fit

A pin can satisfy its diameter requirement while the mating component still lacks the required clearance. Record both requirements and their supplied condition explicitly.

Manufacturing detail

Paired Pin Bores Share More Than a Diameter

Ear APin bore

Clear gapMating-part envelope

Ear BPin bore

Common body and functional reference

Size: Pin fit in each bore.
Relationship: The drawing-defined position and alignment of the paired bores.
Released state: Gap and bores checked without a fixture forcing the arms into position.

Read the manufacturing explanation

A fork end must connect two bore axes with the fork gap and adjoining body. Casting supplies the arm sections and stock, while the final machining plan establishes the paired relationship. Support both arms without forcing the gap into a false condition, then inspect the released part from the intended functional references.

05 / 10 · CNC planning

A Common Setup for Paired Pin Bores

Review how both ears are located and supported during machining. A common reference plan should establish the bore relationship required by the drawing.

Agree the actual machining approach against the slot width, tool access and component stiffness. The objective is the specified relationship, rather than an assumed process based only on a photograph.

Review casting and CNC interface planning

Long metal lever with a bored eye and slender handle — A related lever also connects its pin interface to a larger working geometry.

06 / 10 · Local finish

Edge Clearance and Local Finishing

Bore edges

Define the required edge condition after machining.

Slot contacts

Protect the surfaces and clearances used by the mating part.

Cleanup regions

Keep finishing within the agreed envelope around the ears.

Specify any treatment or coating condition that affects fit, then measure the interface in the required delivered state.

07 / 10 · Finished acceptance

Bore Relationship and Sample Measurement

Evaluate both bore size and their specified relationship. Use the drawing's datum and geometric requirements rather than infer alignment from the ease of inserting an unqualified pin.

Dimensional record

Identify the bores, slot and relevant locating references.

Functional evidence

Agree any pin or assembly check and its role in the acceptance plan.

Relia can provide agreed key dimensional records with characteristics and sampling frequency set per order.

Rounded tongue bracket with two holes and short side tabs — A tongue component provides a related mating-interface reference without being the same fork geometry.

08 / 10 · Catalogue connections

Fork and Lever Catalogue References

Use the selected fork, clevis mount or lever form to begin an enquiry. The actual drawing and mating geometry establish the material and acceptance requirements.

View cylindrical fork and precision-casting enquiries View clevis mounts, levers and bracket enquiries

09 / 10 · Production release

Release the Casting and Machining Route Together

Drawing

Freeze the pin fit, slot and related references.

Sample

Review the agreed dimensions and interface evidence.

Batch

Arrange production after customer approval.

Keep later changes to the pin, slot or ear sections connected to the controlled component revision.

10 / 10 · Start an interface review

Share Your Fork Drawing and Pin Requirements

Send Relia the drawing, material and quantities. Include the pin requirement, mating-part envelope and the slot surfaces or bore relationships important to assembly.

Email the fork and pin brief

Review our manufacturing scope · Explore Relia Casting

Email: [email protected]
Phone: +86 185 6176 2631
WhatsApp: +1 404 203 0971
Company and address: Relia Casting
No. 96 Shuyuan Road
Qingdao, Shandong, China